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Re: [BUG] Memory leak in MySql package [message #39921 is a reply to message #39719]

Sat, 11 May 2013 11:27

mirek is currently offline

mirek
Messages: 13980
Registered: November 2005

Ultimate Member

klugier wrote on Sat, 20 April 2013 09:05

Hello Alboni,

You are absolutly right, We need to count global number of MySqlSession instances. If the number of instances falls to zero we need to call mysql_library_end().

I use a memory profiler called valgrind. I invoke him with following command:

valgrind --tool=memcheck --leak-check=full --show-reachable=yes ./ProgramName

I enclose completed patch for this issue. I have added new static variable to count number of instances (numberOfInstances) of the class MySqlSession.

Sincerely,
Klugier

I believe that your code does not really do anything with numberOfInstances - it is always zero.

Anyway, while not quite sure about what mysql_library_end does, what about simply putting it to EXITBLOCK and call when any MySql was performed to keep valgrind quiet?

Mirek

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[Message index]

		[BUG] Memory leak in MySql package By: Klugier on Fri, 05 April 2013 12:43
		Re: [BUG] Memory leak in MySql package By: Alboni on Fri, 19 April 2013 16:12
		Re: [BUG] Memory leak in MySql package By: Klugier on Sat, 20 April 2013 15:05
		Re: [BUG] Memory leak in MySql package By: BioBytes on Fri, 03 May 2013 21:48
		Re: [BUG] Memory leak in MySql package By: Klugier on Sat, 11 May 2013 02:31
		Re: [BUG] Memory leak in MySql package By: mirek on Sat, 11 May 2013 11:27
		Re: [BUG] Memory leak in MySql package By: Klugier on Sat, 11 May 2013 17:19
		Re: [BUG] Memory leak in MySql package By: mirek on Wed, 22 May 2013 09:41
		Re: [BUG] Memory leak in MySql package By: Alboni on Wed, 22 May 2013 10:13
		Re: [BUG] Memory leak in MySql package By: mirek on Wed, 22 May 2013 10:40
		Re: [BUG] Memory leak in MySql package By: mirek on Sun, 26 May 2013 20:18
		Re: [BUG] Memory leak in MySql package By: Alboni on Wed, 22 May 2013 11:53
		Re: [BUG] Memory leak in MySql package By: piotr5 on Thu, 23 May 2013 12:52
		Re: [BUG] Memory leak in MySql package By: Alboni on Thu, 23 May 2013 13:17

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